PARKERVISION INC

Ticker: PRKR CUSIP: 701354300 Class: USD

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q2 2018

Shares 1,596 Value ($000) $1 Avg Close $0.71 Range $0.48 - $0.82

Q1 2018

Shares 2,847 Value ($000) $2 Avg Close $0.94 Range $0.76 - $1.25

Q2 2016

Shares 4,742 Value ($000) $15 Avg Close $3.22 Range $2.19 - $3.90

Q1 2016

Shares 4,556 Value ($000) $14 Avg Close $2.56 Range $1.70 - $4.00

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	1,596	$1	$0.71	$0.48 - $0.82
Q1 2018	2,847	$2	$0.94	$0.76 - $1.25
Q2 2016	4,742	$15	$3.22	$2.19 - $3.90
Q1 2016	4,556	$14	$2.56	$1.70 - $4.00